Apparatus for coating roofing units



Dec, 2, 1930.

C. R. M DONALD APPARATUS FOR COATING ROOFING UNITS Original Filed March 13, 1926 8 Sheets-Sheet l Dec. 2, 1930. c. R. cDoNALn' 1,783,575

- APPARATUS FOR comma Ro'onga man's I Original Filed March 13. 11926 8 snets-snet 2.

Dec. 2,1930. R. MwD ON ALD 1,783,575

APPARATUS FOR COATING ROOFING mzI'rs Original Filed March 13, 1926 8 Sheets-Sheet 4 Dec. 2, 1930. c. R. M cDoNALD 1,733,575

APPARATUS FOR COATING ROOFING UNITS- h Original Filed March 15, 19.26 a sheets-sheet 5 Dec. 2, 1930. c. R. MacDONALD APPARATUS FOR COATING ROOFING UNITS 'Original Filed March 13. 1926 8 Sheets-Sheet 6 Dec. 2,1930.

Original Filed March 13, 1935 c. R. M IIJONAL'CZ APPARATUS FOR COATING Roor'me' UNITS 8 Sheets-Sheet 7 C. R. M DONALD APPARATUS FOR COATING ROOFING UNITS Dgc. 2, 1930.

Original Filed March 13, 19 3 sheetsfsheet 8 @067 6. F01 fwwza z 1 &

Patented 2-, 1930 UNITED STATES PATENT) orncs oimsrm a. p norama, or aornnaronn, NEW ninsnr, hssre'non, BY xnsm: as

sremrrmrs, 'ro rim ram-1mm mo .ucnnsnre conroaarron, or nos'ron, mesa- CHUSETTS,A OORPOR ATION OF MASSAC'.H 'USETTS nurtures non coa'rme noorme um'rs Original application fled larch 13, 1926, Serial No. 94,877. Divided and this application filed October 84,. Y 1927. Serial No. 288,180.

- This application is a division of m co'- ndin'g application Serial No. 94,377, filed ii arch 13, 1926, for method of coating roofin units. The invention has relation generr a y to the, production of roofing materials, and particularly to those which comprise a fibrous foundation made resistant tonwater,

wear and weather by the application thereto of suitable water roofing and wear-resisting substances. Ordinarily a bibulous feltproduced on paper-making machinery from a furnish comprisingrags, cellulosic material,

hair, wool or asbestos or the like, is employed as the foundation and the sheet is saturated with asphalt while the latter is in a liquid condition,-usuall when molten. The'saturated-sheet'is or arily coated on one or both faces with asphalt ,.usually a relatively.

high melting point blown asphalt, and is surao faced on one or both faces with a mineral material, such as crushed slate, sand, fine pebbles or the like. The sheet, of saturated, coated and surfaced felt, is then cut into in 'dividual roofing units, such as individual as shingles or strip shingles, socalled, of various sizes and designs. 7 Because of the fact. thatthe finished sheet is ordinarily flat and,

relatively thin, a roof' covered with such roofing units presents a thin and relatively unsubstained appearance. An additional finished sheet since the fibers and the asphalt are'exposed at the cut edges to the actionof causing a-more rapid I saturated, coated and'surfaced, as hereinbefore described, or its equivalent. A further object of.the invention is to provide means carryin them through a process of butt thickening automatically. Accordin to my invehtioma'suitable coatto the'butt portions 0 the roofing units'and disclosure in the drawings in which,-

disadvantage flows from the cutting of the saturated felt or of .felt which has been I for handling individual pre-cut strips and.

ingmateria (e. g. asphaltlmaybe, applied allowed to drain somewhat while the units are maintained in a substantially vertical position. Under the influence-of avity and surface tension, the coating flui tends to gather to some extent, depending largely on the viscosity of the fluid, towardthe butt edge so that the resulting coat is tapered in thickness from the butt edge toward the head portion of the unit, and the edges sealed by an envelo of the coating material. 7

Another 0 ject of the inventiomis to provide means for completely surfacing: the butt edge of the strip with grit ,or equivalent material andfor rounding off the butt edge.

Another object of the invention is to pro- 5 vide means for applying difi'erentvkinds or colors of grit or comminuted surfacing material to t e two sides of the strips. 1 Other objects and advantages will "be I manifest tojone skilled in the, art from the 10 Figures 1, 1a and 16 together represent a side elevation of a'machine for-carrying out one method of thickening the butts of roofing units and further treating, the .side :18 frame ,being broken away to show more clearly the operating parts. ,Figure 2 isa transversesection of the machine showing strip clamps in end View. Figure 3 is a transverse section of the mas0 chine on the line 3'3, of Figure 1a.

Figure 'iis a detail of a strip clamp with a fragment of the conveyor by which it is carried.

Figure 5 is a detail of the mechanism for 1 seizing strips: from the feeding conveyor.

Figure 6 is a detail of the mechanism for tilting the clamps with their strips after the dipping step; g 4 v Figure 7 is a detail of the mechanism for releasing the strip. Figures 8 and Sa' represent diagrammati cally a system of driving mechanism for operating the'machine, r

' Figure 9 is a vertical section of a completed strip taken through one of the cut-outs.'

- Figure 10 isags ction of the butt portion of the same on a larger scale. Q

Figure 11 shows an attachmentfor applyedge. These units may be supplied by a sucelements, which are subjected to the process ing coating in narrow stripes tothe head portion of the strips.

Figure 12. is a section on the line 1212 of Figure 11.

5 Figure-13-sh0ws a shinglestrip coated by the mechanism shown in Figure 11.

Figure 1 1 isa section on the line 14-14 of Figure 13.

Figure 15 is a section on the line 15-15 of Figure 13.

line 1818 and to-the operation of the machine to be described, are first formed in any suitable sizes and shapes by any suitable machinery. 5 While for most purposes, I propose to treat those .elements which have been cut from a sheet of saturated, coated and mineral-surfaced fibrous material, nevertheless, the elements may be cut from an unsaturated sheet,

311.01 one which has been saturated, and, if desired, coated. As will be explained, the elements to be treated are successively and automatically subjected to a coating operation, and then to as a surfacing operation, and finally discharged in' a finished "condition.

Referring to the embodiment of my invention illustrated in Figures 1-7, indicates a pair-of endlessconveyors, preferably in the form of chains, to which may be attached suitable clamping devices 11 at regular intervals adapted to seize each individual roofing unit and carry it through the successive steps ofthe process. As shown in Figures 1, 1a

and 1b, the successive clamps 11 pick up individual roofing units 12 which as stated may be shingle strips or shingles of any kind or size of raw or saturated roofing felt, roofing seconds, or other equivalent material, or of coated and slated material. In several figures of thedrawing where shingle strips are shown, the form illustratedis one having the outline shown in Figure 13, with slots or cut-outs extending upwardly from its butt cess'ion of holders 13 traveling on a conveyor 14 so arranged as to bring the successive roofing units 12 into positions where they can be picked up by the successive clamps 11, as will be described hereinafter in more detail. In-

stead of a mechanism for supplying the units 12, the feeding'may be done by hand or by any other desired method. The clamps 11. carry the unitsfrom the holders 13 over a suitable receptacle 15which contains a coating liquid, such as blown asphalt or any other desired equivalent which may be heated electrically, by steam pipes 16, or by other means, to a suitable temperature to regulate the viscosity of the liquid for the thickness of coating desired. Supply and drain pipes 16a, 16?; may be connected with the container 15. The conveyors 10 are preferably led over sprocket wheels 17 18, 19, which are so disposed asto lower the clamps 11 with the roofing units they carry as they pass over the receptacle 15. The guiding sprocket wheels are so arranged that each shlngle strip will be dipped to a desired depth in the coating fluid, and will thereupon be removed from the coating fluid, both the dipping and the removal taking place while the shingle strip is maintained in a substantally vertical position. The entire surface of the submerged portion of the strip will be completely covered with the coating compound, including all the edges of the cut-outs. During its removal and subsequently while the strip is in a vertical position, it is obvious that the coating will tend to flow and drain toward the bottom edge of the strip, thus assuming a tapered form with maximum thickness at the butt edge of thestrip. A wiping device, which is preferably in the form of a steam pipe 20, may be positioned so as to engage each strip at its butt edge, and thus to remove the drippings of coating material therefrom. In order to be adjustable for strips of differing height, the pipe 20 may be pivotally mounted as by an elbow 21 so as to be raised or lowered at will. From the dipping vat, the shingle strip is carried to a suitable conveyor 22 which may comprise'an endless belt arranged to receive comminuted surfacing material on its surface from a suitable hopper 23 and to be led by guide rolls so as to engage the butt edge of the succ'essiveshingle strips as they are carried from the coating vat. Any desired surfacing material, such as crushed slate, grit, powdered mica or chalk, electrically conducting granules or powder (desirable when the strip is to be electroplated), cork, sawdust, or other -equivalents, maybe supplied to the belt 22 from the hopper'23. For brevity, this material will be hereinafter referred to generically as grit, it being understood that any desired comminuted material may be included in the term. Before contacting with the gritcovered belt 22, each strip is preferably tilted backwardly by means to be described in detail hereinafter, so as to project the butt edge forwardly just before it comes in contact with the grit-covered belt. The relative speeds of the conveyor 10 and the belt 22 are so regulated that the upper portion of the shingle will be carried along faster than the lower portion. In this way, the head portion of the ibackwardly tilted shingle will overtake the forwardly, extending butt portion so that the backwa tilt will change to a forward tilt while the edge remainsin contact with the grit on the belt. This is shown clearly in Figure 1a. As a result, the butt ed e of each strip is simultaneously rounded o and surfaced with the grit or other surfacing material on the belt 22. This effect is illustrated in the conventional cross section of'a portion of the finished strip shown inFigure 10.

When the strip, as it travels along, has been tilted forwardly to a suflicient degree, tripping means engage and open the clam holding itso that the strip is allowed to all forwardly on the grit-covered belt 22. This brings the entire forward face of the. strip in contact with the grit on the belt, with the result that sufficient grit sticks to the coated portion of the forward face to surface the coating. The belt is thereupon carried along I and transferred. to another conveyor or belt 24, the excess slate on the belt 22 dropping into a suitable receptacle 25 as the strip passes from one belt to the other. The conveyor 24 carries the strip beneath a suitable hopper 26 which deposits grit upon the upper surface of the strip, whereupon the strip may be led between press rolls 27 of which four are shown, although any desired number may be supplied. These press rolls may be cooled by the circulation of water therethrough, or r by any other means, and a guide belt 28 may be led around the upper rolls. If desired, the unit may then be led through a further cooling device, such as that indicated at 29,

after which it may be deposited in a suitable receptacle or conveyor 30 which is preferably so constructed as to allow excess slate from the top surface of the strip and from the belt 24 to fall through into a container or hopper 31.

Havingoutlined briefly'the course of the shingle strip through the machine, I will now describe in more detail the various instrumentalities which are utilized in the successive steps. A clamp llfor gripping and holding a unit is illustrated in Figure 4 on an enlarged scale. Each clamp may comprise a pair of jaws 32, 33 at each end of the sheet.

The correspondin aws at the opposite ends of the strip may e separate or may be connected as by the plates 34 (Figure 2), so as.

"clamps-11 may bemounted upon; a rod'35 supported at eithrfend by the conveyors/10.

The'clamps 11, may be of any sriitable con} struction. As'shown in-Figures 2 and 4, the

jaws 32 are fixed tothe-bar 35 to turn therewith. The jaws 33 are rockably mountedon arms 32a, 33a. 1

ers 37 to engage suitable cams hereinafter to be described. The jaws 32 are likewise vprovided with bosses 38 which are adapted to engage other cam surfaces as' by rollers'39. At a convenient point on the rod 35 an arm 40 may be fixed adapted, as by a roller 41, to engage suitable cams in order to rock the rod'35 and the clamps 11 associated therewith. The rod 35 carrying the clamps 11 may be secured to the conveyors 10 as by brackets 42, each of which may be secured to a link of the chain conveyors 10. The pins 43 connecting the successive links of each conveyor 10 are preferably each provided 1 In Figure 5 is shown the apparatus for causing the clamps 11 to pick up successive strips from the holders 13 carried by the feediiig'eonveyors 14. A cam surface 47 may be provided 'to engage the rollers 37 on the clamps 11 so as to tilt the clamps forwardly in their travel to escape fouling a cam 48 as they are carried with the conveyors 10 around a suitable sprocket, wheel 49. As indicated by the successive dotted positions in Figure 5, the clamps 11 in passing around the sprocket wheel 49 bring the rollers 37 into engagement with the cam 48 while the rollers 39 engage the cam 50. The cams are so disposed as to cause the simultaneous engagement ofthe rollers 37, 39 therewithto open the aws 32, 33 of the clamps 11 as the clamp is traveling downwardly so as to engage a strip 12, which is at the same time'being advanced by the travel of a holder 13 carried by the conveyors 14. 'When a clamp 11 reaches the lowermost point of the sprocket 49 and is directly over'one of the holders 13,

the rollers '37, 39 ride clear from the cams 48, 50 and allow the spring 46 to close the jaws 32, 33 upon the strip 12. A pair of cams 51, 52 are preferably disposed so as to engage suitable rollers 53 carried by the holders 13 l in such a way as to cause theholders .13 to retain a vertical position until they'have descended about the sprocket 54 far enough to clear'the bottom of the strip 12, which is now clamped and carried by clamps 11. The

holders 13 are preferably attached pivotally to links in the conveyors 14 as at 55, and may ,beheld in vertical position while carrying a I strip 12 by. a horizontal extension of the the'rod 35 and have extensions 361projecting' cam 51.,- Upon clearing the bottom edge'of a upwardly therefrom the upper portion; .of these projections beihg adapted as by rolL- strip-12, each holder 13 is allowed to swing ,downwardly and is conveyed back the original feeding point where another strip 12 may be supplied to it by hand or by any suitable feeding mechanism. I

As has been previously descr1bed,the.strips 12, after being gripped by clamps 11, are carried over a vat. or other suitable container having a coating compound therein, which is preferabl in liquid form. The conve ors 10 are then epressezl as by asprocket wheel 18 so as to cause the strip 12 to be dipped into the coating compound to a predetermined depth and removed therefrom while in a substantially vertical, position, the drippings from the butt edge of thestrip being removed as by a wiper 20. The clamp 11. is thereupon conveyed toward the grit-covered belt 22. A cam mechanism which is shown in detail in Figure 6 may be provided to tilt the clamp ll'backwardly so as to project the butt edge of the strip 12 forwardly immediately prior to its contact with the grit-covered belt 22. This may be done by means of a suitably shaped cam 56 on which the roller 41 is adapted to ride. As will be seen from the successive positions indicated in Figure 6, the cam 56 will tilt'-theclamp;11 backwardly as itgoes along, thus swinging the butt of the stri 12 forward in the directio'n of mo- I lthough the strip 12 may in some tion. cases sag on account of the flexibility of the material of which a manufactured roofing is customarily made, the tilt will be sufficient to cause the butt edge of the strip to contact the grit on the belt with the rearward portion of its butt edge, as indicated by the reference character 57 in Figure 10. After the butt edge of the strip has contacted with the gritcovered belt 22, the roller 41 rides free from the cam 56 and at the same time the conveyors 10 carrying the clamp 11 are caused to proceed upwardly on an are indicated in Figures 1- and 1a, the direction of motion being governed as by a guide 'trackc58' which may be of such a shape that the clamp 11 may straighten the strip 12 to a'vertical position, with its butt end all the. time in contact with the grit onthe belt 22, and then may swing the strip forwardly until it is released by a suitable cam mechanism and allowed to drop on its forward face on the belt 22. The mechanism for causing the clamp 11 to release its strip is shown on an enlarged scale in Figure 7. An upper cam surface 59 may be provided to engage the rollers 39 of the forwardly tilted clamp 11 in such a way as to maintainthe forward tilt of the 'aw 32 on which the roller 39 is mounted. hile the jaw32 is maintained with a forward tilt, the rollers 37 are adapted to engage a cam 60 which is positioned to swing back the upper arm 36 of the jaw 33, and thus to separate the jaws 32 and 33, permitting the strip 12 to fall therefrom flat on the belt 22. The

result of the motion of theclamp 11 onthe from a backward tilt to a forward tilt, is a rounding off of the butt edge of the strip with a simultaneous application of a surfacing of I grit or other comminuted material which may the excess grit falling through the gap between the adjacent ends of the horizontal portions of the belts 22, 24." The belt 22 ma be further led oversuitable guide rolls suc as 63, 64, 65, one of which, such as 63, may be movable in order to adjust the tension of the 'belt. Instead of using two conveyors 22, 24,- it is obvious that the'belt 22may be extended so as to include the functions of the belt 24. As a result ofusi a. single belt, the rolls 27 press the strip while its lower be.desirablewhen the nature or condition of the coating material is such that insufficient grit will stick to the strip unless greater pressure is applied to it than results .from the wei ht of the strip itself. On the other hand, i desired, two successive endless belts may be used instead of the belt 24, the two faoais in contact with excess grit onthe :belt;v This may belts having a gap betweenthrough wliichi may fall the grit which is-deposited on the belt from the hoppe volving brush 66 or other suitable meansmay be supplied in contact with the; belt-22 to remove any coating material that might stick thereto, but ordinarily a cleaner 'wilLnot berequired. The belt 22 is preferably driven as by the roll 62 or any of the other rolls over which it passes, the speed of the belt being somewhat less than that atwhich the conveyors 10 are driven. This difference of speed enables the turning over of the strip 12, as previously described, during the travel of the clamp 11 along the track 58.

As the strip 12 leaves the belt 22, it is picked up by, the belt 24, a roller or other device being positioned between the ends of the belts, if the size and material of the strips require, to prevent the units from falling through between the belts.- The strip is thus carried along under a hopper 26 or other device fordepositing any desired surfacing material upon the upper face ofvthe strip. This surfacing material may be any desired comminuted material, such as crushed slate or grit of any kind, eitherin a single color or a combination of colors, which may be put on in bands or other patterns as de-j sired. Instead of slate, grit or granular mar 26. If desired,' a r85- terial of any kin'd may be used, or powdered mica, chalk, orelectrically conductive material, or the equivalents of any-of these. The belt 24 carrying the strip 12, the entire coated surface of which is now covered with one kind or another of comminuted material, may now be led between a series of rolls 27 which serve to embed the grit adhering to' both surfaces of the strip, and also, if desired, to cool the strip. For this purpose, the rolls 27 may be] constructed hollow as shown in Figure 3,

, suitable flexibleconnections 67, 68 being providedfor circulating water, air or other cooling fluid through the rolls. In order to allow the upper rolls 27 to ride over the successive units without flattening out the tapered coating by excessive pressure, the bearing blocks.

I 27 0, in which the rolls are journaled, may be mounted in verticalslides 271 so that the upper rolls, 27 can rise as they ride over the increasing thicknessof the unit passing be- .neath, pressing thereon simply with their own weight plus that of the liquid within.

Excessive pressure can therefore be avoided I .by' making these rolls of suitable size and materials to give the weight desired. It is evident that many other equivalent methods may be used to exert a yieldingpressure on the tapered units suflicient to partially embed in the coating material a layer of comminuted material in contact therewith. The' strips may, if desired, be cooled further by passing through any desired cooling device, such as the one indicated at 29. This may be an air -cooler as shown, or cmore rolls may be used instead. When thestrips 12 are sufliciently cooled, they ma be deposited in a receptacle or carrier 30. y leading the belt 24 about suitably positionedguide rolls '69, 70, the

:strips may be deposited vertically in the carrier 30, the latter being preferably construct ed so as to allow surplus material which "has been carried along by the belt 24 from the hopper 26 to fall through and, be .recovered as b a receptacle 31.

. T e finished strip 12 will then have a complete envelope of coating material over its entire butt portion including both surfaces and all the edges. This coating will'have been somewhat tapered by the action of gravity during .the dripping of the excess coating material from the strip. A surfacing of one kind .of material will cover the rounded butt edge and'cut-out edges on one face of the coated portionof the strip. A surfacing of the same or different materials will cover the 1 oppositecoated face oft-he strip. As a result,

' In this eas the felted material has been the product is a substantial roofing unit with a fully protected'exposed portion and a thickcnedb'utt edgeftapering toward the head portion which' .presents' an attractive andsubstantialzappearanc'e to the roof when laid.

' '1 Figure i's-lshownin cross section an example of the butt portion of a finished unit.

speeds.

saturated and has received La preliminary coating 6 of waterproofing material with a surfacing of grit c, after which, the sheet has beencooled and cut into units. These units are fed into the machine as 'hereinbefore" described and acquire a continuous coating d, d of high melting point asphalt or e ui'valent material on the butt portion of othfaces and the butt edge, as well as on all the edges of cut-outs or notches in the butt portion. The coating (1, d is surfaced with the layers e, f of comminuted material, the layer 6 being on the face of the unit which is fore- .Inost as it progresses throughthe machine and being a continuation of'the surfacing on the rounded-buttiedge, The layer f may be of the same or difierent material as that of e, and meets the layer e at or near the rearward portion 57 of the butt edge. The sec-- tion in Figure 10 is illustrative only as it isiobvious that the coating andsurfacingas described may be applied to units of various other materials. 4

In Figures 8 and 8a, an outline of the driv= ing connections is diagrammatically indi- Gated, Power may be supplied by any suitrolls 62 may be operatively .connected to the shafts74 as by a shaft 7 6 connected with suitable gearing. Instead of the direct connection shown, any of the variable speed transmissionunits, such for example as the Reeves drive, maybe interposed between the roll 62 and the,shaft 74,- wherebythe relation betweenthefsp'eeds of the conveyors 10 and the belt 22 may be readily adjusted to accommodate r'oofin units of different sizes. The belt 28 may be riven by the press rolls 27 which may be operatively connectedto the shaft 74 by suitab e fgearing. 'As shown in Figures 3 and 8a, theupper rolls may be driven fromp the lower rolls as by gears 272, 273, the gears 273 alsomeshing with a gear 274 which is operatively connected as by a shaft 275 and suitable, bevel gears to the power shaft 74. The belt- 24 may be driven by the motion of the rolls27 between which 1t passes. Furthey provision for drivin the-belt 24 may also be made by operative y connecting any a of the other rolls which it engages with the power shaft 74. previously mentioned, the gearing connecting the'rolls 62with the drivdshaft 74 isso arranged as to give the belt22. a somewhat lower speed than theconveyors in order that the head of the strip 12, which is tilted backwardly when the butt edge contacts with the belt 22, may overtake the butt edge during the travel of the clamp .11 alon the'track 58 so that the strip will be 'forwar ly tilted when the clamp 11 lets go.

In Figure ll is illustrated an attachment by which the machine may be used to produce the type of shingle strip illustrated in Figure 13.' These strips are made with cut-outs '77 to form shingle-simulating tabs78. In orderto givea' maximum protection with a minimum amount of coating materiak-it is desirable to apply narrow stripes 79 of grit surfaced coating to the head portion of the strip, these stripes 79 being preferably positioned half way between the slots 77 so as to lie under the slots of the strip in the course immediately above as laid on the roof and ve full protection just where it is needed. hese stripes of coating 79 may be applied bya series'of coating rolls 80 which may be supported as by a suitable shaft 81 over the container from which coating material is :6 sup lied tothem as by feed rolls 82. The

sha 81 is preferably connected to the power I shaft 7 4 by suitable gearing so as to drive the coating rolls 80 with a peripheral speed equal to the linear speed of the conveyors 10. The

feed rolls 82 may also be driven by any desired means, such as sprocket wheels 83 and a chain 84. In order to revent coating material from cooling onft e sides of the rolls 80 and thus increasing the virtual widths of these rolls in a mannerrto deposit stripes 79,

of excessive or irregular width, suitable scrapers 85, 86 may be-provided for the sides of the rolls 80 and 82,respectively, to confine the coating material to theperipheral surfaces of these rolls. The r0 ls 80 are positioned at such an elevation that their peripheries will contact the strip 12 at suitable pomtsnear the topthereof. The'progress of 1 portion as indicated in the strip illustrated in Figure 13. If desired, the striping rolls 80 may be placed at the other end of the contamer 15 so as to apply the stripes of coating to-the head portions of the strip after it has been dipped. The subsequent steps of applying comminuted'surfacmg material to the coated areas are then'followed as have been hereinbefore described.

A still further form of thickening may be produced by a modified form of the coating apparatus as illustrated diagrammatically in Figure 16. Instead ofdipping the stri s into the material, asuitablecoating roll 8 may pende be used-to receive coating material from a feed roll 88 and deposit it on thebutt portions of the forward fa e of stri s which are brought into contact with it an led over it. If desired, striping rolls 80 may precede or follow the roll 87 so as to produce stripes 79 -on the head portion'as shown in Figure 17', a

The strip which has been coated by the mechanism shown in Figure 16 will have a I structure like that indicated; in Figures 17 and 18 wherein the strip has a somewhat tapered coating surfaced with grit material on one side onl the stripes 79 on the coated side being app ied by striping rolls such as are shown in Figure 12.

' Having thus' described certain embodiments of my invention, it should be evident to those skilled in the art that many changes and modifications might be made therein without departing from its spirit or scope as defined 35 .by the appended claims.

I claim v I 1; Apparatus of the class described, comprising means for seizing and holding'susa strip shingle with butt edge ower-" to most, a liquid container, means for'conveying said seizing means and strip over said con-' tainer, means for loweriiig said holding means whereby a strip held thereb is lowered to a predetermined depth in said liquid, and raising the holding means whereby to remove a stri held thereby from saidliquid,

. and means or causing said seizing means to releasesaid strip. 7

2. Apparatus of/the class described, com; 190 prising means for coating a portion of the surface of a roofing unit, means for removing the 'unit from the coating means, means for swingably suspending'said unit during said coating and removing of the unit and means 10 for doctoring said unit as it is removed from y the coating means.

3. Apparatus of the class described, comprising means for coating a portion of the surface of aroofing unit, including its butt no edge, means for rounding ofi the coating on said butt edge and means for doctoring said unit. I

t .4. Apparatus of the class described, comprising means for coating aportion of the 1 surface of a roofing unit with impervious material, means for rounding off said coated edge and surfacing said edge and the coated portion of 'a face of the unit with comminuted material and means for doctoring said unit after the coatingoperation;

5. Apparatus of the class described, comprising means for coating a portion, of a ,7 roofing unit'including the butt edgethereof with impervious material, a movable. gritreceiving member-,means for depositing grit on said member, means for causingcontact of said coated butt edge with said grit and 1 means for turning said strip on said edge as an axis while said. edge'is in contact with the grit on sa-idmember.

:BQ'Apparatus of the class described,'comprising means for coating a portion of the surface of a roofing unit including the butt edge thereof, and means forrounding off said coated'edge and appl ing a continuous. surfacing of comminute material to said edge and the coated portion of one face of the unit, 7L Apparatus of. the class described, comprising means for applying stripes of coating material to a face of a roofing unit, means forapplying coating material to the butt portion of said face, and means for swingably suspending the unit during the operation of both said coating means.

' 8. Apparatus of the class; described, comprising means for applying'zstripes of coatmg material to a face of a roofing unit, means 1 for applying coatingmaterial to the butt portion of said face, means for removing the unit from said coatin -means, and means for swingably suspending the'unitiduring said removal.

' 9. Apparatus of the class described, comprising a container for liquid waterproofing compound, an endless'carrier, means for depositing grit on said carrier, means for suspending a roofingelement'with its butt edge lowermost, means for dipping said roofing element into said compound and removing the strip therefrom. while thus suspended,

means for advancing'the strip toward said earner, means for placing the butt edge of the tilted stri on said grlt, means for turn-L ing the strip forwardly on saided e until it is prone on the grit, and means for ep'ositing jgrit on the upper surface of thestrip.

10. Apparatus of the class described, comprising means for advancing a; body of loose .grit, meang for depositing a, pre-formed,

coatedroofing element on said "grit whereby, said element is carried thereon, means for depositing additional grit upon the element,

and means for pressing the grit againstboth sides of said element as it is carried along with said body of grit.' 3 j 11. An apparatus for coating a'nd'surfacing roofing units comprising means for advancing a plurality of roofing units, a container for coat ng compound, means for causing the butt portions 'of the successively advance ing strips to be engaged with coating compound within said container, means for successively withdrawing the vjunits from the container in a substantially vertical position and means for applying comminuted material to the coated areas of the units duringtheir successive advancement from the container.

12. An apparatus for coating shingle units, comprising means for. horizontally advancing a pluralityof units, a container for coating material, means for successively depressing the units into engagement with the coat materialin said container whereby to surface the lower portions of said units in'- eluding their butt edges and means for Sue cessively rounding-01f the coating on said butt edges of the units after they are sucroofing unit and conveying said unit through a bath in a position whereby excess coating material will. drain therefrom into the bath, means for applying comminuted surfacing 'material to the coated faces of the unit, and means for pressing the surfaced faces of the unit. s p

15. Apparatus of the character described, comprising means for forcibly gripping a roofingunit, means for conveying said unity as thusgripped through a coating bath in position to apply coating material to the butt portion of said unit, means for removing the unit from said bath, and means for swingably suspending the unit during said re moval.- 16. Apparatus of the character described; comprising means for forcibly gripping'roofing'elements and conveying them through a coating tank in position for applying coat ing material to the butt portion of the elements, said means being arranged to permit eizcess coating material to drain from the faces of the element, means for positioning said elements in a substantially horizontal plane after removal from the bath, means for surfacing the elements while in the last named position. l v 17. Apparatus of the character described, comprising means for gripping and advancing roofing elements, acontainer for coating com'pound,"said means being adapted to convey the elements through said container insubstantially vertical position, means for positioning the \elements after they. leave the bath in a substantiallyhorizontal plane, and means'for applying comminutedmaterial to the coated areas of the elements while in the last named position. I

18. Apparatus of the-character described, comprising an endless'conveyor, means carried by the conveyor for swingably suspending roofing units, a container for coating material, means for causing the butt portions of the units to be dipped into the material in after removalfroni the container. ll,,

19. Apparatus for treating roofing units,

.said container, means for applying-surfacing material to. the coated pomions of'the units comprising mechanism for gripping and advancing units in substantially vertical position through a bath of coating material, means cooperating with said gripping mechanism for moving said units to substantial horizontal position after they leave thebath, and means for applying granular surfacing material to said units while advancing in J horizontal position.

20. Apparatus for treating roofing units, comprising a pair of press rolls, means for gripping a series of units and advancing them successively through a bath of coating material in position to permit excess coating material to'be removed from the coated faces of the units, means for positioning the units in a plane substantiallyat right angles to the plane in which they are positioned'during passage through the coating material, means for applying granular surfacing material to the coated faces of the units as they are advancing, andmeans for feeding the units in I said position to said press rolls.

21. An apparatus of the character described, comprising means for forcibly gripping roofing units and conveying said units through a bath in a position whereby excess coating material will drain therefrom into the bath, means for successively releasing the units and causing-them to advance in a horizontal position afterthey have left the bath,

and means for applying surfacing material position. f

scribed, comprising means for forcibly grip-' units.

to the coated units while in said horizontal 22. An apparatus of the character deping roofing units and conveying said units through a bath ina position whereby excess coating material will drain therefrom into" the bath, means for successively releasing the units and applying comminuted surfacing material to the coated surfaces thereof and means for pressing the surfaced faces of the 23. An apparatus of the character described, comprising means for successively gripping roofing units and conveying the same successively through a bath while maintaining them; in a position whereby. excess coating material will drain therefrom into the bath, means for successively releasing the units and means for advancing the same in a horizontal position after they have left the bath, means for applying surfacing material fto the thus coated llIlIltS while advancing in a v horizpntal position, and means for pressing the surfaced faces of the units. machine of the character described, comprising,f ni'eans for gripping shingles,

means for conyeying such shingles through a.

coating bath, with the. butt ends of .theshingles lowermost, means for shifting the shingles to a substantially horizontal plane and means for applying comminuted material to the coated areas of the shingles while in the last named position.

25. Apparatus for treating roofing umts comprislng in combination, a pair of press rolls, means for gripping a series 'of units and advancing them successively through a bath of coating material, while maintaining one edge of the units at a plane lower than the other to permit excess coating material to be removed from the coated faces of the units, means for positioning the units in a plane substantially at right angles to the plane in which they are positioned during passage through the coating material,'means for applying granular surfacing material to the coated faces of the units as they are advancing, and means for feeding the units in said position to said press rolls.

26.. An apparatus for coating and surfacing roofing units in a continuous operation, comprisingmeans for gripping the'roofing units and conveying the same through a bath while maintaining them in a position where by excess coating material will drain.therefrom into the bath, means for lowering the units, successively, into the bath and means for applying comminuted surfacing material to the coated faces of the units after they gave been successively removed from the ath.

27. An apparatusfor coating and surfacing shingle units, comprising a conveyor, a

lurality of i pers on the conveyor adaptd to forcibly gr ip a plurality of roofing units and maintain them in a substantially vertical position, a container for coating material, said conveyor being adapted to successively advance the roo units through the coating material in sai container, means for automatically effecting the successive release of the units from the grippers after their removal from the coating bath, means for successively advancing the units as thus coated and means for applying surfacing material to the coating umts' during their advancement. v

28., An apparatus for treating g roofing units fcomprisingz means for coating the units, means for shifting the positions of said units after. theyhave left the coating zone, means for applying comminuted material to the coated faces'thereof and means for pressing the comminuted material into the coated surfaces while the unitsare advancing.

29;. A shingle-coating machine comprising means for gripping a shingle, means for conveying said shingle through a bath in a 'position- -whereb excess coating material will drip therefrom into the bath, means for powdering one side of the shingles, means for gritting the other side of the shingles, and means for pressing thegritted side'of th shingles. V

30. A shingle dipping machine comprising means for gripping shingles, means'for'.

conveying said shingles through a coating bath in a position other than a horizontal whereby excess'matcrial will drip therefrom, means for tilting said shingles to a position approaching a horizontal one, means for powdering the under sides of the shingles, means for applying material to the upper sides of the shingles, and means for rolling said-last named matcrialinto the coating material.

31. The combination with a shingle coating machine comprising a liquid tank, an endless conveyor, means ,carried by the conveyor for gripping shingles, said means being yieldably and rotatably mounted, means co- 7 operating with the shingles for moving the 'same to positions approaching a horizontal after they leave the bath, means for applying powder to the under sides of the shingles, means for applying grit to the upper sides of the shingles and means cooperating with the yieldable and rotatably mounted gripping means for forcing said'gripping means to shingle released position.

32. The combination with a shingle dipping machine having an endless chain conveyor, a coating tank in which shingles are dipped, means-for applying granular material to the coated portions of the shingles after the dipping operation and after they have been moved into difl'erent planes, of means carried by the conveyor for yieldably and rotatably supporting said shingles.

33. In a shingle coating machine, a coating tank, grit applying means," powder applying means, a conveyor, rotatable grip ping means carried by said conveyor adapted to carry shingles through said tank in substantially vertical (position, and means adapted to tilt and hol said shingles in substantially horizontal position while passing said grit and powder applying means.-

34. A shingle coating machine comprising means for conveying shingles through a bath in substantially vertical position, means cooperatin with said first named means for tilting said shingles to substantially horizontal position upon removal from said bath, means for powdering one side of said shingles, and means for gritting the other side of said shingles.

35. A shingle coating machine, comprising means for conveying shingles throu h, a bath in partially submerged substantially vertical position, means cooperating with said first named means for tilting said shingles to' substantially horizontal position upon removal from the bath, means for holding said shingles in tilted position as they pass through the machine, means for powdering the under side of the shingle, and means for gritting'the upper side of the shingle.

36. In a shingle coating machine, a coating tank, grit aplying means, owder applying means, an a conveyor a apted to car- 

